Earlier quoted context omitted.
I would not feel unsafe around someone who voted for Trump, though I might question their morals. I would not feel unsafe around someone who voted for Hillary, though I might question their judgment. I would feel unsafe around someone whose political views were that you should be fired if you voted for Trump. (I would also feel unsafe around someone whose political views were that you should be fired if you voted for…
Do you grant that some people may feel differently about the politics of Trump, or should we shape our cultural norms (after all, that's what we are talking about when we mention "cancel culture") around what YOU think is reasonable or unreasonable politics?
I get that some people feel differently about Trump's politics. (Hey, I feel mighty concerned about his politics.) That's why the standard of what's "reasonable behavior" can't be shaped by how everybody feels. Otherwise, it just turns into a contest to see who can proclaim that they feel what they feel more strongly than the other side.
At some point, some element of determining what is rationally justified by the circumstances has to come into play. But that's hard, because everyone has radically different ideas of what "the circumstances" actually are.
Failing that, the only thing left is existing norms of behavior. And getting someone fired for their politics is well outside of that.